Doctor's Best Proteolytic Enzymes provides a broad spectrum of vegetarian proteolytic enzymes that provide support for muscle, joint, and overall tissue health.* Proteolytic enzymes aid the body in digestion and convert proteins into their constituent amino acids. Enzymes are required to facilitate many diverse chemical reactions in the body. Supplementing with Best Proteolytic Enzymes augments many metabolic functions performed by endogenously produced enzymes.